Lacing-stud machine



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Y H. S ..GRO MBIE. LAGING STUD MACHINE.

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H. S. GROMBIE.

LAGING s TUD MAGHINE.

N0. 549.109. v Patented NOV. 5, 1895.

NDRRW EGRAHAM. PNOTD-UTHQWASHINGI'UMDC.

UNITED STATES PATENT' OFFICE.

HERBERT S. CROMBIE, OF WALTHAM, ASSIGNOR OF ONE-HALF TO TIIEOPI-IILUS KING, OF BOSTON, MASSACHUSETTS.

LAClNG-STUD MACHINE.

SPECIFICATION forming part of Letters Patent No. 549,109, dated November 5, 1895. Application iledMerch 1, 1895. Serial No. 540,204. (No model.)

To all whom it may concern:

Be it known that I, HERBERT S. CROMBIE,

' a citizen of the United States, residing at "Waltham, in the county of Middlesex and State of Massachusetts, have invented a new and usefuly Improvement in Machines for Making Lacing-Studs, of which the following is a specification.

My invention relates to improvements in machines for manufacturing a headed hollow-shank rivet into a lacing-stud by cutting away a part of the head, so as to leave a neck having a different axis from the axis of the hollow shank and so smooth, circular, and finished as to lessen the fraying of the lacing, and for simultaneously cutting a trench upon the top of the head of the lacing-stud for retaining enamel or any other desired covering. I attain these objects by the mechanism illustrated in the accompanying drawings, in which- Figure 1 is a top plan of my machine. Fig. 2 is a vertical section through the machine, showing also the hopper and raceway. Fig. 3 is a sectional detail. Fig. 4 is a front view of the pulley, showing end of the raceway broken away. Fig. 5 is a section on line 5 5 of Fig. 2.

Similar letters refer to similar parts throughout the several views.

My invention will be most easily understood by first considering Fig. 2, in which is shown a frame A, through which runs the main shaft B, operated by the fast and loose pulleys C and having the edge cam D, with the camgroove b, for operating the sliding shaft F, which immediately or by a clinch holds the rivet, and the edge cam E for operating the sliding shaft G, by means of which the cutting devices are moved forward and back. The shaft B, which is operated by the fast and loose pulleys C, imparts motion to the cam E, having groove c, cam-roll c', and pin c2. By this motion forward and back of the shaft G two cutters are moved back and forward, one of which is to cut out a portion of the head to make the hook for the lacing-stud and the other to cut a channel upon the top of the head or hook of the lacing-stud. The shaft B also rotates the edge cam D, by which the shaft F is carried forward and back. This shaft F by its part f', Fig. 3, clasps about the shank of the rivet as delivered from the raceway K and carries it forward into conjunction with the partN of the eccentric part 7c of stationary shaft H, which part N fits closely to the rivet-head x, so that the rivet may be held firmly while subjected to the action of the cutters, which imposes a considerable strain upon the shaft B from the cam D. To partly offset this strain, the plate a. is connected with the frame by means of the screw a..

Referring to Fig. 2, it will be plain that the pressure of shaft F against the upper part of the cam-wheel D, caused by resistance of the stud, will crowd the lower part of said cam toward the framework, and to relieve this the plate a is provided.

Upon the stationary shaft H revolves the bearing g'l for the cutter J. The cutter J is carried on the sliding wedge-shaped block e, normally held in the position shown in Fig. 2 by the spring h, and has the cutting-edge e. The operating-wedge f, which is pinned to the sleeve g', is forced forward upon the block e by the revolution of the cam E, operating through shaft G and angleepiece g2, whereby the edge e of the cutter J is forced downward upon the head of the rivet, which is held by the parts N f until a part of the same is cut away, as shown best in Fig. 3, and, what is an important novelty in the result accomplished by my machine, is so cut away as to leave the finished neck circular and smooth. In order, simultaneously with this operation, to force the knife j to cut a trench for the purpose hereinbe'fore mentioned on the top of the head, it is evident that such second knife j must revolve upon a different axis from that upon which the cutter J revolves, inasmuch as while e is intended to cut out a part of the head, so as to leave a neck having a different axis from that of the shank, the trench-cutter j is to cut a trench or channel having the same axis as that of the shank, of the rivet. I accomplish this by pivoting the cutter j upon the sleeve or collar k2, which, it will be seen from Fig. 2, has the same axis as has the shank of the rivet when held by the parts N f, but a different axis from the neck of the rivet formed by the cutter c. Upon the stationary IOO part 7c of shaft Il revolves sleeve k2, operated by means of screw k, running into slot 7a in pulley I, Fig. 4. The pin t, when upon the revolution of the cam E the part f is carried forward, comes in contact with the rear of the cutterj, as best shown in Fig. 3, and forces its edge against the top of the stud-head, and as the pulley I revolves the cutter j will cut a trench upon the top of the head, as desired. On the contrary, the critter J when in action revolves concentric with shaft H, its radial motion being determined by movements of the wedge f.

In Fig. 3 the rivets 9c are shown coming down the raceway K, and as the cam E re= volves far enough to withdraw the cutting mechanism and the cam D to withdraw the shaft F the completed lacing-stud, its head striking spring M, fastened to raceway K, drops away from between the parts f' and N, and the next rivet in the raceway K will descend, and, guided by spring M, its shank x2 will be grasped by extension f as the shaft F is brought back by means of the cam h in the pulley D, and forced forward until it meets the part N, in order to allow a repetition of the same operations upon the second rivet.

It will be now seen that my invention includes the conjoint operating of two cutting mechanisms, each of which is caused to advance and recede according to the time necessary to be spent in performing the respective operations, one of which is made to take an eccentric and advancing motion, so as to cut out a part from a circular solid head of a rivet and the other of which is made to take a circular motion to cut a circular trench upon the circular head of the completed lacingstud.

Having now described the parts of my invention, I will explain its operation.

rlhe shaft B is operated or left at rest by means of the fast and loose pulley C, as will be readily understood. The back-and-forth movement of the shaft F by means of the edge cam D will also be plain, as will the effect of the cam E, carried upon the shaft B, to move forward and back the shaft G, by means of which the cutting' devices are moved forward and back. The rivet having descended through the raceway and been caught between the parts N f of F and I'I, its head will be approached as the pulley I revolves by the eccentric cutter J e', the part fadvancing with the advancement of the shaft G, forcing the wedge f upon the part e and causing point c to revolve eccentrically about the solid head of the rivet a; until the space a," has been cut therein, as shown in Fig. 3. Meanwhile the cutter-edge j has advanced, as heretofore described, and has cut a trench upon the top of said rivet, In the alternate movements of the two cutting devices any undue friction is avoided by the screw k3, Fig. et. Upon these operations having been severally performed the revolution of the cam E will cause the retraction of the shaft G and the cam D of the shaft F, and so of the connected devices, and the finished lacingstud will fall, as above described, allowing the operation to again be repeated upon a succeeding blank rivet.

l-Iaving thus described my invention, what I claim is- 1. In a lacing stud machine, a slotting device for cutting a slot eccentric with the studshank, consisting in the combination of a permanent shaft l-I, a sleeve, and a pulley I carried upon said sleeve, a cutter J carried upon a block e, a spring 72l to hold said block from the sleeve, an eccentric part k of said shaft I-I, adapted to hold the blank stud eccentric with the sleeve upon which said pulley revolves; substantially as described and shown.

2. In a lacing stud machine, a channeling device composed of an eccentric extension 7o of the' permanent shaft H upon which the tool-carrying pulley revolves, a sleeve for said extension k, a cutter] loosely pivoted upon said sleeve, and devices lfor bringing said channeling cutter against the head of the blank stud in order to cut a channel or rim thereon; substantially as described.

3. In a lacing stud machine, a combination of the shaft H, having an eccentric extension k, sleeves c g for carrying a wedge device and a tool-carrying pulley respectively, a wedge f, a slotting device composed of slide e, knife J, and spring h, a channeling knife j loosely pivoted upon a sleeve upon the extension 7c, and a tool-carrying pulley revolving concentric with the shaft and eccentric with the extension 7a of the shaft II; substantially as described.

4. In a lacing stud machine a device for properly operating the wedge by which the slotting knife is brought into play, consisting of the combination with the main shaft, of a ,cam and a horizontal moving bar G properly connected with said cam by a cam roll and a groove, and an angle-piece g2 connected with G and adapted to make contact with the sleeve upon which the wedge device is carried; substantially as described.

5. In a lacing stud machine, the combination with main shaft, pulleys and cams, of an eccentric extension k and a tool-carrying pulley I, a concentric slotting knife as described carried therein, and an eccentric channeling knife j carried upon the sleeve 7i;2 rotating upon the extension 7o of the shaft upon which said pulley rotates; substantially as described and shown.

G. A lacing stud machine for making lacing studs from hollow shank rivets consisting of a framework, main shaft and cam wheels E, as shown, a cam D and cam roll connections therefor, and a horizontal traveling shaft F operated thereby and adapted to hold the blank stud in position, a permanent shaft Il having an eccentric extension 71:, a tool-carry ing pulley I revolving upon the sleeve g working upon said shaft H, a slotting knife composed of the slide e, knife J, and spring 7L, all carried by said pulley I, a sleeve g and a IOO IIO

lWedge fthereon for moving said knife into Wedge-moving device and to cnt a channel 1o position, aWedge-moving device composed of upon the top of the head of the completed a cam run by the main shaft, a horizontal lacing stud; substantially as shown.

traveling bail G operated by said cam, and In Witness whereof I hereunto set my hand having a presser-piece adapted to make conthis 28th day of February, 1895.

tact With said Wedge-carrying sleeve g, and a HERBERT S. CROMBIE. channeling knifej loosely pivoted to the sleeve In presence of- 7a2 of the eccentric extension 7c, and adapted NATHANIEL U. WALKER,

to be moved by, or in connection with, said L. C. SARGENT. 

